Olobrio, I unfortunately nearly did fall for this one, and thanks to this post didn't. Had all the hallmarks of the same thing, i.e. Emails first, Meet in the bar, which I did, 'she's just getting ready' etc.
Then out came the 'can we settle up here as had a problem with previous client' line.
Told him no, and will give her money, saying I'd seen reports of these scams before. He refused so said he'd need to go the room with me. He refused so I got up and walked.
Not sure he chose the right hotel either as was a 5* in the west end, so didn't sound right!
Hope that helps, but don't go near them!!
Reported to adultwork, but they weren't interested.